Peter,
This is the easiest Wireframe tool I have run across. I donwloaded the software and had it running in 3 minutes, and had no problem creating a 5 page wireframe in under 1 hour. Well done.
I have a bit of a problem with Checkbox groups and Radio Button groups. They work perfectly when displayed vertically, but I cannot arrange them horizontally.
Would you consider adding a "Horizontal Display" property for those two controls?
Myron